Home / 20,272.26-27,977.76-12,315.28

Finding the Fourth Proportional to 20,272.26, 27,977.76 and 12,315.28

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Solution

The fourth proportional to 20,272.26, 27,977.76 and 12,315.28 is: 16,996.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.26 : 27,977.76 = 12,315.28 : x
  2. Step 2: Convert to fraction form
    20,272.26/27,977.76 = 12,315.28/x
  3. Step 3: Cross multiply
    20,272.26x = 27,977.76 × 12,315.28
  4. Step 4: Simplify right side
    20,272.26x = 344,553,948.17
  5. Step 5: Solve for x
    x = 344,553,948.17/20,272.26
  6. Step 6: Final answer
    x = 16,996.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.